At a pro-Hamas rally in the heart of New York City, speaker after speaker praised the slaughter of civilians that had taken place in Israel on Saturday, after the terrorist group overwhelmed Israeli defenses in an audacious, unexpected raid. “And as you might have seen, there was some sort of rave or desert party where they were having a great time, until the resistance came in electrified hang gliders and took at least several dozen hipsters,” one speaker joked about the Hamas assault on a desert rave, where horrific scenes of murder and rape took place. It was a bracing...